Adding carbon to the equation of flight search

Help to protect the environment by choosing “greener” flights

Start here

Scroll to learn more

Your Choice Matters

Gruener-Fliegen.com is a unique flight search engine to book your flight and to reduce your carbon footprint. We combine all three relevant components of sustainable air travel:

Climate
Climate

Know your flights’ climate impact and make a qualified choice – we match flight options worldwide with their precise climate footprint, based on data sources from independent scientific research.

Learn more
Search and Book
Search and Book

Search for flights from over 750 airlines. We partner with kiwi.com – 24/7 customer service & guarantee if your flight gets canceled or delayed – we offer flight connections to enable less CO₂ and lower prices.

Learn more
Offset
Offset

Trust is mandatory – compensate your flight’s climate impact. All project are registered and carried in accordance with the highest international standards – offset your flight’s carbon footprint with atmosfair.

Learn more
User experience
Lukas — Student, Berlin
“Knowing a flight's footprint will influence my booking in the future. Easy and clean”
Lukas — Student, Berlin
Travels to see the world
Charlotte — Mother, Munich
“Everybody should know and consider their environmental impact when booking a flight.”
Charlotte — Mother, Munich
Prefers train and bus, only flies for urgent matters
Holger — Manager, Wiesbaden
“Way to go! An independent and transparent flight search engine with the potential to force the industry to really become sustainable!”
Holger — Manager, Wiesbaden
Travels for business and to see his family
Santa — Logistics, North Pole
"Probably the best alternative to reindeers"
Santa — Logistics, North Pole
First in zero-emission flight
How it works
Search
Search
To start, enter your destination, travel dates, number of people travelling with you and we will look for hundreds of possible flight options matching your travel plan.
Compare
Compare
Now the “magic” happens: we are adding carbon to the equation of flight search. Easily compare flights by their impact on the environment, by travel time and price (including offset!).
Reduce
Reduce
Your choice matters. Choosing the flight with the lowest emission will not always be possible, but in any case, please compensate your impact and offset.

Real data. Real science. Independent.

A lot of scientific research and real data is required to calculate the individual footprint of each flight. Here are the most important factors we take into consideration when calculating the flight carbon footprint.

Learn more about our data

plane
Flight profile
Airline (fleet)
Aircraft type
Travel class (seating)
Passenger load
Engines
Cargo capacity
Follow us on social media

Follow us to stay updated and get the best out of our platform. No spam, no ads, just sustainable travel!

FROM OUR BLOG
Let's fly green – GruenerFliegen is a free online flight search engine. A unique, independent and transparent platform, dedicated to simple and sustainable travel
Read article
Other information
Sustainable Travel (Blog)

There are great opportunities to combine travel and sustainability. Here we provide you with insights and news around sustainable travel, destinations and technology.

Learn more
Emission Data

Airplanes emit several pollutants that harm the climate with different durations and intensities. We calculate them approximately in terms of carbon dioxide.

Learn more
About Us

Find out how GruenerFliegen works, why we think it is worth making this your preferred flight search engine, and learn about our goals, believes and the people behind the project.

Learn more
Feedback

You can help us by providing us with an honest feedback. Our goal is to continuously improve our service to make environment a part of every online search.

Learn more